Basic Questions

Do you love Bitcoins? Then, you must know what a 51 percent attack is

By Maria Santos

Last Updated: Jan 2, 2018

ss-hacker

Here it is, one of Bitcoin’s major weaknesses: the 51 percent attack. Mainly because we never approached this issue, today we decided to explain what this attack means. And if you still don’t know what we’re talking about, we’ll explain it to you.

Everything begins with Bitcoin records. The digital currency system records every transaction that happens on its network and the data is saved in a public record called the blockchain.

Roughly, a new record is generated every ten minutes, added to the blockchain and then shared in the network. Here lies the vital factor: whether the blockchain is the real one or, otherwise, a fake one and, for that, it should be discarded. How do we determine this? By checking which result is accepted by the biggest number of mining codes.

And what happens if a fake blockchain is accepted as real? Well, if a Bitcoin user can take over enough nodes and dictate its own fake version of the blockchain. He can counterfeit Bitcoins or even spend the same “coins” multiple times.

Currently, the biggest Bitcoin miner has 15 percent of the total hashing power. This is an acceptable number, but if this value skyrocketed to 51 percent, all the cryptocurrency system could come down.

So, this is the basic information about a 51 percent attack, but if you still have any question send it to us on a comment and we’ll try to answer.

Via wired.co.uk

Disclaimer Icon
Disclaimer
Crypto is a high-risk asset class. This article is provided for informational purposes and does not constitute investment advice. You could lose all of your capital.
99Bitcoins may receive advertising commissions for visits to a suggested operator through our affiliate links, at no added cost to you. All our recommendations follow a thorough review process.

Free Bitcoin Crash Course

  • Enjoyed by over 100,000 students.
  • One email a day, 7 days in a row.
  • Short and educational, guaranteed!

Why you can trust 99Bitcoins

10+ Years

Established in 2013, 99Bitcoin’s team members have been crypto experts since Bitcoin’s Early days.

90hr+

Weekly Research

100k+

Monthly readers

50+

Expert contributors

2000+

Crypto Projects Reviewed

Google News Icon
Follow 99Bitcoins on your Google News Feed
Get the latest updates, trends, and insights delivered straight to your fingertips. Subscribe now!
Subscribe now
Maria Santos
Maria Santos
Crypto Writer

Maria is an experienced journalist currently living in the UK. She has been writing about Bitcoin and the altcoin universe since 2013. She is also a member of the Lifeboat Foundation's New Money Systems Board and a big cryptocurrency supporter. Read More

Back to top